blob: 9d24c40f1967ad6ec5aad6e79d88db69deda93d2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/fcntl.c
3 *
4 * vfs operations that deal with the file control API
5 *
6 * Copyright (C) International Business Machines Corp., 2003,2004
7 * Author(s): Steve French (sfrench@us.ibm.com)
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23#include <linux/fs.h>
24#include <linux/stat.h>
25#include <linux/fcntl.h>
26#include "cifsglob.h"
27#include "cifsproto.h"
28#include "cifs_unicode.h"
29#include "cifs_debug.h"
30#include "cifsfs.h"
31
32static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
33{
34 __u32 cifs_ntfy_flags = 0;
35
36 /* No way on Linux VFS to ask to monitor xattr
37 changes (and no stream support either */
38 if(fcntl_notify_flags & DN_ACCESS) {
39 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
40 }
41 if(fcntl_notify_flags & DN_MODIFY) {
42 /* What does this mean on directories? */
43 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
44 FILE_NOTIFY_CHANGE_SIZE;
45 }
46 if(fcntl_notify_flags & DN_CREATE) {
47 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
48 FILE_NOTIFY_CHANGE_LAST_WRITE;
49 }
50 if(fcntl_notify_flags & DN_DELETE) {
51 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
52 }
53 if(fcntl_notify_flags & DN_RENAME) {
54 /* BB review this - checking various server behaviors */
55 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
56 FILE_NOTIFY_CHANGE_FILE_NAME;
57 }
58 if(fcntl_notify_flags & DN_ATTRIB) {
59 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
60 FILE_NOTIFY_CHANGE_ATTRIBUTES;
61 }
62/* if(fcntl_notify_flags & DN_MULTISHOT) {
63 cifs_ntfy_flags |= ;
64 } */ /* BB fixme - not sure how to handle this with CIFS yet */
65
66
67 return cifs_ntfy_flags;
68}
69
70int cifs_dir_notify(struct file * file, unsigned long arg)
71{
72 int xid;
73 int rc = -EINVAL;
74 int oplock = FALSE;
75 struct cifs_sb_info *cifs_sb;
76 struct cifsTconInfo *pTcon;
77 char *full_path = NULL;
78 __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
79 __u16 netfid;
80
81 xid = GetXid();
82 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
83 pTcon = cifs_sb->tcon;
84
85 down(&file->f_dentry->d_sb->s_vfs_rename_sem);
86 full_path = build_path_from_dentry(file->f_dentry);
87 up(&file->f_dentry->d_sb->s_vfs_rename_sem);
88
89 if(full_path == NULL) {
90 rc = -ENOMEM;
91 } else {
92 cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */
93 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
94 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
95 &netfid, &oplock,NULL, cifs_sb->local_nls);
96 /* BB fixme - add this handle to a notify handle list */
97 if(rc) {
98 cERROR(1,("Could not open directory for notify")); /* BB remove BB */
99 } else {
100 filter = convert_to_cifs_notify_flags(arg);
101 if(filter != 0) {
102 rc = CIFSSMBNotify(xid, pTcon, 0 /* no subdirs */, netfid,
103 filter, cifs_sb->local_nls);
104 } else {
105 rc = -EINVAL;
106 }
107 /* BB add code to close file eventually (at unmount
108 it would close automatically but may be a way
109 to do it easily when inode freed or when
110 notify info is cleared/changed */
111 cERROR(1,("notify rc %d",rc));
112 }
113 }
114
115 FreeXid(xid);
116 return rc;
117}